Sirui 35mm Anamorphic Problem With Loose Lens Mount For MFT – Quite a few people are having trouble with the lens mount connecting the Sirui 35mm to most Micro Four Thirds cameras.
The problem is the mount is so far out of tolerance that it allows up and down rattle, and side to side movement with just the slightest pressure.
The camera mount play can be found when used on most MFT cameras by Panasonic, Olympus, Blackmagic Design, Sharp, and Xiaomi. The biggest play issues with the Sirui 35mm seems to come when mounted on the Blackmagic Pocket Cinema Camera.
A loose lens to camera connection can be bad for video as you can see the horizon rock back and forth. This is intensified when using an anamorphic lens as it creates a wider field of view than normal to get that cinematic look.
This loose lens connection is so far off it clicks back and forth from any focus or aperture adjustments. So, you can’t pull focus during a shot without ruining the entire clip. Even stabilizing in post is not enough to fix the video.
In the video below you can hear the loud audible clicking when turning the focus ring. You also get an audible click at the hard stops on each end of the focus limit.
Update to Sirui 35mm anamorphic lens problem. They are sending out emails to the lens owners whom have complained to the company. Text for Sirui’s project marketing team. “After communicating with the company, we are going to send you a new M4/3 mount for replacement in 1 or 2 weeks as soon as it’s ready, we will also prepare a tutorial for the replacement for your reference then. Thanks!
I will post a video of the new replacement lens mount as soon as it arrives. Hopefully the new mount will be a much better fit.
Most people have been happy with the original Sirui 50mm anamorphic lens the released last year. Let’s hope this was just a small mistake that they will correct soon.
Update on Sirui 35mm MFT lens mount: 9/29/2020
Sirui has sent me a replacement MFT mount that I swapped out myself. The new mount fits much better than the one that came on the lens.
The SIRUI 35mm F1.8 1.33X Anamorphic Cinema Lens is scheduled to be released on October 9th. That may be up in the air until they get the lenses fixed.